Printing-telegraph.



No. 888,335. PATENTED MAY 19, 1908. C. L. KRUM.

PRINTING TELEGRAPH.

APPLICATION FILED AUG.22, 1903.

16 SHEETS-SHEET 1.

No. 888,335. PATENTED MAY 19, 1908. C. L. KRUM. PRINTING TELEGRAPH.

APPLICATION FILED AUG. 22, 1903. 16 SHEETS SHEET 2 M HHYIH A 7.. Q fi 3 9Q E H .E .w a w Vb a? O 3 O l W 2 Q3- i o i II 3 1 I 1 2 I 8 8 2 X3 3 11x3 Mm 3; 3K 0 m II N d No. 888,335. PATENTED MAY 19, 1908. G. L. KRUM.

PRINTING TELEGRAPH.

APPLICATION FILED AUG. 22, 1903. 16 SHEETS SHEET 4.

r ram/[1S No. 888,335. PATENTED MAY 19, 1908. C. L. KRUM.

PRINTING TELEGRAPH.

APPLICATION FILED AUG. 22, 1903.

16 SHBETS-SHEET 5.

W/TA/EJSEJ @M/ N0. 888,335. PATENTED MAY 19, 1908.

G. L. KRUM.

PRINTING TELEGRAPH.

PPLIO T NIILED (1.22 A A 10 AU 1903 16 SHEETS-SHEET s.

W MMAQXZ M N0. 888,335. PATENTED MAY 19, 1908. O. L. KRUM.

PRINTING TELEGRAPH.

APPLICATION FILED AUG. 22, 1903.-

16 SHEETS-SHEET 'I.

No. 888,335. PATENTED MAY 19, 1908.

U. L. KRUM.

PRINTING TELEGRAPH.

APPLIOATION FILED AUG. 22, 1903.

16 SHEETSSHEET 8.

No. 888,335. I PATENTED MAY 19, 1908. C. L. KRUM.

PRINTING TELEGRAPH.

APPLICATION FILED AUG.2Z,1903.

16 SHEETS-SHEET 9.

No. 888,335. I PATENTED MAY 19, 1908. G. L. KRUM.

PRINTING TELEGRAPH.

APPLIOATION FILED AUG. 22, 1903. I

16 sums-sum 1o.

MAIL

PATENTED MAY 19, 1908. O. L. KRUM.

PRINTING TELEGRAPH.

APPLICATION FILED AUG. 22, 1808; 16 SHEETS SHEET 11' W/T/I/EJJEJ No. 888,335. PATENTED MAY 19f1908. 0. L. KRUM.

PRINTING TELEGRAPH.

APPLIOATION FILED AUG. 22, 1903.

16 SHEETS-SHEET 12.

9 N mm ii Mu A MX/W N0- 888,335. PATENTED MAY 19, 1908. C. L. KRUM.

PRINTING TELEGRAPH.

APPLICATION FILED AUG. 22, 1903.

16 SHEETS-SHEET 13.

HTTOIP/VB/ No. 888,335. PATENTED MAY 19, 1908. c. L. KRUM.

PRINTING TELEGRAPH.

APPLICATION FILED AUG. 22, 1903.

16 SHEETS-SHEET 14.

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- PRINTING TELEGRAPH. APPLICATION FILED AUG. 22, 1903.'

16 SHEETS-SHEET 16.

No. 888,335. PATENTED MAY 19, 1908. C. L. KRUM.

PRINTING TELEGRAPH.

APPLICATION FILED AUG.22,1903.

l6 SHEETS-SHEET 16.

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M .4. My PM v/M UNITED sTATEs PATENT oF IoE.

CHARLFiS L. KRUM, OF CHICAGO, ILLINOIS.

PRINTING-TELEGRAPH.

To all whom it may concern:

Be it known that I, CHARLES L. KRUM, a citizen of the United States, and a resident of Chicago, Cook county, Illinois, have invented certain new and useful Improvements in Printing-Telegraphs, of which the following is a'full, clear, and exact description.

This invention has relation more particularly to'that class of printing telegraphs in which the messages transmitted are reproduced at the receiving station by being printed upon sheets of paper as in ordinary typewriter work.

he main object of the invention is to provide improved means for the reproduction of the messa es at the receivin station althou h features 0 the invention w 1 be found app icable for use in other situations.

The invention consists in the features of improvement hereinafter described, illustrated in the accompanyin drawings and particularly pointed out in t e claims at the end of this specification. I

Figure 1 1s a front view'of m improved machine, certainparts being omitted. Fig. 2 is a view in rear elevation. Fig. 3 is a view in horizontal section through the main mechanism being omitted.

, vertical section.

frame of the machine, the up er parts of the ig. 4 is a view in vertical cross-section. Fi 5 is an enlarged detail view of part of t e mechanism for actuating the inking ribbon. Fig. 6 is a view in vertical cross-section adjacent the inner side wall of the main frame, parts being shown in elevation. Fig. 7 is a view in horizontalsection through the base portion of the main frame a slight distance above the key levers, the finger pieces of the key levers bemg shown in plan. Fig. 8 is aapla'n View of the upper, portion of the main frame, certain parts sustained thereby and the main paper carria e upon the main frame. Fig. 9 1s a deta' view showing one of the key levers and circuit controlling mechanism at the inner end thereof, parts bein shown in Fig. 10 is a etail lan view of the key lever shown in Fig. 9. ig. 11 is an enlarged detail plan view of the inner end of one of the ke levers, the contact brushes being remove Fig. 12 is a detail view in rear elevation of the bars that suport the contact plates withwhich the ke ever brushes coo erate. Fig. 13 is a detall view in 1perspectlve of one of the contact strips. ig. 14 is a detail perspective view of one of the individual contact plates. Fig.

Specification of Letters Patent. Application flled August 22,1908.

Patented m 19, 1908.

Serial No. 170,419.

15 is a detail view in vertical longitudinal section throu h the frame of the main aper carriage showing the contact rail beneat the same. Fig. 16 is a detail plan view of the main paper carriage, its su porting rails and the contact rail beneath the main carriage. Fig. 17 is a view in central cross-section through the parts shown in Fi s. 15 and 16. Fig. 18 is a detail plan view of t e part of the main frame above the paper carriage platen together with the typebars, their hangers and part of the inking ribbon mechamsm. Fig. 19 is a detail view infront elevation of the platen, a art of the hiking ribbon and its su port in fiont thereof and certain of the type ars. Fi 20 is a detail plan view of t e platen an mechanism for feeding the paper thereto and adjacent parts. Fi 21 1s a view in vertical cross-sectlon throug the supplemental paper carriage or platen support adjacent one end of the platen, certam parts being shown in cross-section. Fi 22 1s a detail View in end elevation of the p aten sup orting frame, the platen and part of the mac anism for eflectin the line-space movement of the platen. Fig. 23 is an enlarged detail view in front elevation of the inkmg ribbon and parts of the mechanism whereby it is sup orted and controlled. Fig. 24 is an enlarged detail view of the pawl and ratchet mechanism for imparting the letter-space movement to the paper carriage, adjacent parts being shown in elevation. Fig. 25 is a detail view in vertical cross-section throu h the main paper carriage, the s ring drum or retracting said carria e, an the carriage rails, certain connecte parts being shown 1n elevation. Fi 26 is a view in cross-section on line 'y'y of Fig. 25, the parts being shown inverted. Fig. 27 is a detail lan view of the carriage retracting spring and drum with the cover removed. F1gs. 28 and 29 are diagrams of the operating circuits.

The various details of construction will first be described and thereafter the electrical circuits and connections whereb the o eration of the parts is effected will e set orth.

The frame A of the machine will be of the appropriate construction and shape to re ceive the various parts of the mechanism. As shown, the front of the frame is stepped (see Figs. 4 and 6) to form a key board through which extend the stems b of the key levers B, the heads of the stems b-being rovided with the usual fin er pieces mar ed with characters corresponding to the various key levers, etc. The key levers B are removably pivoted u on 'U-shaped hangers 2 that depend from t e portion a of the top late of the'rnain frame at the rear of the key board, the key levers B being furnished prefrably with U-shaped metal bearing; plates 3 extending around the bottom an sides of the key levers (see 9 and 10) these hearing plates formed wit 'notchesto receive the han ers 2. Preferably guard hooks 4 pivoted as s own, to the, bearing plates 3, are employed to more securely retain the key levers 1n position upon their hangers and each of the bearing plates is shown as provided with a hump or slight offset 5 over which the hook 4 may be sprun this oflset serving to retain the hook in 516 position shown in 6 and 9 of the drawings. The hangers 2 are arranged in rows corres onding in distance apart with the several anks of keys, thereby insuringuniformity of touch in action to the keys.

At the front of the key board there is arranged a spacer bar B that is connected with the ke lever 6 corres ending in construction to the key levers lof the several finger keys. 'The'spaeer bar B (see Fig. 7) is supported upon a U-shaped frame I) plvoted as at 7 to the sides of the main frame, the down ward movement of this U-shaped frame being limited by lugs 8 projecting inwardl from the sides of the main frame and beneat the U-shaped frame I). Across the top of the several key levers B and from side 'to side of the machine extends the universal bar 10, the arms of which are pivoted to the sides of the main frame'as at 11 and are formed with the upper extensions 12 (see Fig. 6) to which are connected coil springs 13 that' serve to U press the universal bar and consequently the various key levers, down to I1OI'II18,lOS1l'/lOI1. By reference more particularly to ig. 6 of the drawings it will be seen that each of the tension springs 13 has its forward end connected to a threaded rod 14 that extends to the front of the main frame and is fitted with an adjusting nut 15 that enables the tension of the spring 13 to be adjusted as desired.

Each of the keylevers B has mounted u on its rear end a block of insulating materia 16 that is slotted to receive the rear end of the key lever (see Figs. 912) and upon this block of insulating material are mounted two contact brushes 17 and 18 normally insulated from each other and rojecting forwardly from the upturned en of the angular insulating block 16. Each of the key levers B is providedwith means whereb the brushes 17 and 18 shall be in electrica connection while the key is performing its functions and whereby these contact plates shall be electrically disconnected when the ke has comleted its function. Preferably t is contact Between the lates 17 and 18 of each ke lever is effected by means of the U-shape pin 20, the arms of which pass through holes or sockets in the insulating block 16. Each of the pins 20 loosely fits its socket so that it may be shifted in such manner that its shorter arm may be forced between the brushes 17 and 18 to close the electrical cir cuit therethrough or may be shifted from between these contact plates to electrically disconnect them. To revent the accidental shifting of the in 20 refer to attach to the side of the insu ating b ock 16 a s ring plate 22 having at its end a pin 23 that passes through the side of the msulatingblock 16 and bears lightly a ainst the pin 20 so as to hold it by frictiona contact in any position to which it may be moved.

The .brushes 17 and 18 on the rear end of each of the key levers, have their free ends arranged to work between a plurality of contact bars or supports 25 that are arrangedbeneath the top plate of the main frame at its rear. These contact bars are arranged as a grid or grating and each'of the bars has attached to one of its sides a continuous metal contact strip 26 and to its opposite side one or a number of individual contact plates 27 that are embedded in the hard rubber or'like material of which the bars 25 are formed. The upper ends of the bars 25 are secured to or formed in piece with the top plate 28 of hard rubber or like insulating material that rests u on and is secured to a bridge plate 30- exten ng from side to side of the base of the main frame at its rear. tact strips 26 are formed with angular portions whereby they may be securely fastened to the edges of the bars 25 and in like manner each of the contact plates 27is shown as formed with an offset part adapted to extend over the edge of the corresponding bar 25 and to receive a set screw 32. The screws 32 of the contact plates 27 serve as binding posts for these plates to which binding osts will be connected electric wires that wil lead to an electrical selective apparatus which will be connected with the various electro inag nets in the machines of both the sending and receiving stations, it being understood that the machine herein described is used for both the sending and receiving instruments. The purpose of the contact plates 27 is by their number and by their connections to enable the actuation of any one of the key levers B to cause the electrical selective apparatus to appropriately energize such electric magnets o the machine at the sending and receiving stations as may be in electrical connection with the various contact plates with which vsuch key lever is designed to co-act.

By reference more articularly to Fig; 9 of the drawings it will be seen that when the key levers B are in their normal position, as shown by full lines, the U-shaped pin 20 serves as a bridge or electrical connectlon between the contact brushes 17 and 18 and as Preferably the conthese cpntact plates are of spring metal they I will bear. u

sho ter arm of the U-shaped pin 20. If, now, the operator depresses one of the character keys, the rear end of the corresponding key lever B .will be raised, ,thereby.lifting the brushes 17 and 18-and causing them to pass respectivelyover the contact strip 26 and contact plates 27 between which the brushes 17 and 18 of such ke lever move. Hence, as the brushes 17 an thus travel in upward direction, they will successively close the circuits between the individual contact plates 27 upon one of the bars 25 and the individual contact strip 26 upon the next adj acent bar, thereby permitting current to pass through the circuits in which such plates and strips are interposed, such circuits being open until thus closed by the movement of the brushes 17 and 18. In this way it will be seen that the key levers B will initiate a series of current impulses corresponding to the contact plates 27 and the character of the circuits in which such plates are interposed, as will presently more full appear. As soon however as a key lever B. as risen to the top of the supports 25 between which it moves, the head 29 of the contact pin will strike a bar 35 located upon the under side of the top plate of the base of the main frame at its rear and the contact pin 20 will be shifted from the position shown by full lines to the position shown b dotted lines in such figure. When thus s ifted the contact pin 20 no longer serves to connect the brushes 17 and 18 and consequently during the return stroke of each key lever the passage of the brushes over. the individual contact plates 27 does not effect the closing of the circuits at such points. As the key lever B that has been actuated in manner above described returns to its normal position, the bottom of the pin 20 will contact with the stop 36 at the base of the main frame and the u per end of the shorter arm of the pin 20 (wliich will be beveled) will be forced between the brushes 17 and 18, thereby electrically connecting these brushes in readiness for the next operation of the key lever. The various circuits that will be controlled by the operation of the key levers in manner last described will be hereinafter more fully set forth.-

By reference more particularly to Figs. 3 and 7 of the drawings it will be seen that in the form of my invention shown, the key board comprises thirty-eight keys, although manifestly the number may be increased or diminished if desired. Of the keys shown, thirty-six are used for characters to be printed, one marked with the abbreviation Ret. (see Fig. 3) is for effecting the return movement of the pa er carriage and one (marked with the ab reviation Rev.) is for effecting the independent revolution of 5 the paper holding platen. The types wheren the opposite sides of the by the impressions are to be made are carried by type heads 0 (see Fi 18) that are mounted on the free ends of t e type bars C; these ty e bars being formed at t eir inner ends wit journal bars 0' that are journaled in brackets 40 and 41 mounted upon the top plate a of the main frame. The type bars are preferably arranged as shown in Fig. 18, in order that the corresponding type of each type head may strike a common rinting point upon the latch that is located eneath the top plate 0 the main frame. As shown, there are twelve type bars, consequently in order that each of the thirty-six characters (cor-responding to the keys above described) ma be printed, each of the type heads a will be urnished with three types and the laten will be shifted in manner to be present y described in order to vary the rinting point for any one of the types upon the type heads. The journal bar 0 of each of the type bars is formed with an ofisetarm 42 at its outer end and to such offset arm is connected (see Figs. 1 and 6) the u per end of a draw rod 43, the lower end of t his draw rod being connected with an o crating lever 44 whereby the type bar may e actuated. Each operating lever 44 is secured to the armature bar 45 that is ivoted as at 46 to brackets 47 that rise from t e top plate of the base of the main frame. The front end of each of the armature bars 45 extends above an electro magnet D and the rear end of each armature bar extending below the corresponding electro magnet D, the functions of these magnets D and D being to cause the armature bar to actuate its corresponding type bar when the ma nets are energized b the passage of current t erethrough. As s own,-each pair of magnets D and D is carried by an angular bar or yoke 5 48, to the upper and lower arms of which the corresponding magnets are secured. A coiled spring 49 having its lower end attached to t e main frame and having 'its up er end attached to an adjusting rod 50 t at passes through the rear end of the armaturelever 45, serves to restore the lever to normal position after a type bar has been actuated by the energization of the magnets D and D, and an adjusting nut 51 upon the threaded rod 50 enables the tension of the spring 49 to be varied as desired.

The paper to be printed will be carried by a cylindrical platen E (similar to the platen I commonly used in ordinary typewriting machines) that is journaled in uprights e e upon I a paper carriage to which a step-by-step motion will be imparted in order to effect the letter-space movement of the platen and to which a rotary motion will be imparted to effect thenecessar line-space movement of the paper. T e carriage whereby the platen is supported will also have'imparted thereto movement at right angles to its line 'of travel in order that any one of the three types carried by each of the type heads 0 may strike centrally and in the line of print upon the'platen. In order to Iguide and retain the paper upon the platen, provide the platen at the rear with a pair of pressure rolls E and E that are mounted upon two angular arms or levers 55, one upon each end of a shaft 56 extending, across the paper table F at the rear of the platen. The roller carrying arms 55 at the opposite sides of the paper table, being connected together by the shaft 56, it is obvious that these arms and their rollers will move in unison and one of the arms 55 is provided with a forwardly extending handle 58 whereby the arms and rolls may be shifted. In piece with one of the angular arms or levers 55 is the extension 59, having a yokeshaped piece 2 pivoted thereto. The yoke e is provided with abutments for engaging either the upper or the lower member of the lever 55, and a spring (3 is arranged to hold the yoke on one side or the other of central position. By this means one or the other of the pair of pressurerollers E and E will be spring-held mto engagement with the platen.

A screw e connected to one end of the springs and thumb-wheel e serve to adjust its tension. The opposite end of the spring 6 (see Fig. 20) is connected to the part 6 on the carriage.

The paper table F is secured to the end of the standards e and e whereon the platen E is journaled, and as shown (see Figs. 20 and 22) the pa er table extends rearwardly and its forwar end is preferably rovided with an upper guide plate f below w ch the paper will pass. By reference to Fig. 21 it will be seen that the forward edges of the paper table F and of the guide plate f are bent so 'as to better guide the paper and avoid danger of tearing it. Across the front of the platen extends a plate f that serves to press the paper against the platen, the free edge of thls plate f being provided with the usual letter-space scaleas clearly shown in Fig. 20. The scale platef is mounted u on a rodf carried by the guide arms or ates f 3 that extend upwardly from below tile platen and serve to direct the paper around the platen. Upon the rod f 2 are mounted coil'springs f the ends of which bear upon the plate f (as shown in Fig. 20) and serve to normally force the free edge of the plate f toward the platen E. The rod f 2 to which the platef is attached has one of its ends f 5 bent and extended outward over the arm or lever 58 so that when this arm or lever 58 is lifted, the ressure of the plate f upon the platen will e released. When a sheet of aper is to be inserted it will be placed upon t e table F and will be moved toward the platen. The arm 58 will be raised'thereby lifting the free edge of the scale plate f relieving the ressure of the u per feed roll E from the platen and forcing t e lower feed roll E against the that this transverse shift of the laten. The operator b then turning the and-Wheel E at the en of the platen, will cause the free edge of the paper to ass around the platen until the up er edge of the paper is beneath the presser ro E; then by depressing the arm or lever 58 the presser ro E will be brought to bear against the paper, holding it snugly upon the platen, and the scale plate f will also be brought to bear upon the pa er. By means of the plate f and feed roll the paper will be held snugly upon the platen and when revolution has been imparted to the platen, the paper will be moved the necessary distance to effect the necessary spaces between lines of print.

The mechanism whereby the transverse shifting of the paper carriage and of the platen E sustained thereby will be effected, will next be described, it being understood laten is made in order to permit any one o the seva eral types at'the ends of the t e bars to make its impression in the line of irint. The prlaten E is mounted upon a supplemental ame or carriage 60 (see Figs. 1, 2, 4 and 6) that is sup orted upon anti-friction rollers 61 j ournaled in brackets 62 at the ends of the main'paper carriage. These rollers 61 are preferably formed with V-shaped peripheries to receive the correspondingly shaped edges of the end bars of the supplemental frame or paper carriage 60. Suitable bars 63 at the ends of the sup lemental paper carriage 60 serve to retain t e supplemental carriage in osition upon the supporting rollers 61. P ins 63 on the lower ends of the bars 63 engage lugs 63 63 u on the main paper carriage to hold the supp emental carriage 60 against vertical displacement. Centrally beneath the supplemental paper carriage 60 and from end to end thereof extends a web or bar 65 that'is straddled by the yoke shaped upper end of the laten shift bar G and preferably in the yo e shaped end of this platen shift bar are j ournaled small antifriction rolls 66 that bear on opposite sides of the pendent web or bar 65. The platen shift bar G is pivoted as at 68 to a bar 69 supported on the main frame of the machine (see Fig. 4) and at its lower end the platen shiftbar G has forwardly and rearwardly projecting arms g that are provided with pins g that extend through the slots 70 ormed in the pendent. armature bars 9 and 9 that are pivoted as at 71 and 72 to the bar or bracket 69. Each of the armature bars 9 and g is provided with an armature facing its corres onding magnet (l and G and the tension 0 these magnets G and G3 is to normally hold the platen shift bar or platen in median or central osition and avoid the use of springs for suc purpose.

T e magnets G and Gr are supported respectively by brackets 75 and 76 projecting 

